overheats both and has new pump plates robertson 180 new engine about 2000 miles 30 over flat top pistons basicly stockbeen trough carb for lean and timing is 34 totalI haven't checked the damper for slipagewith a standard 180 it will at 70 deg at idle go to 210 with robertson it will hold at 187 to 190 at 70 deghas new recored 4 core radiatorstock 7 blade fan with heavy ac clutch fan which the car did not have and fan shroud which was not stock but read something about the holes in the heads maybe not be enough to allow more flowI believe the radiator is big enough and maybe it needs more miles but I think at 70 it should not be that hot. Last summer it was 95 and it goes to 210 stop or goI was looking for input on the heads as I also wondered about the gaskets but the builder used felpro thanks

it seems we have seen a lot of newly rebuilt motors with cooling problems that they did not have befor. a new new motor will have more friction. therefor making more heat. more hp will also make more heat.

210 in 95* heat dose not sound out of line to me!
76 455/4spd TRANS AM69 GRAND PRIX 455/5SPD